move systems + update contributing.md

1 files changed, 7 insertions, 6 deletions

diff --git a/src/example/particle.cpp b/src/example/particle.cpp
index 53fa213..fb72b9b 100644
--- a/src/example/particle.cpp
+++ b/src/example/particle.cpp
@@ -1,13 +1,14 @@
-#include "Particle.h"
-#include "ParticleSystem.h"
-#include "SDLApp.h"
-#include "api/ParticleEmitter.h"
 #include <chrono>
+#include <iostream>
+#include <thread>
+
 #include <crepe/Component.h>
 #include <crepe/ComponentManager.h>
+#include <crepe/Particle.h>
+#include <crepe/SDLApp.h>
 #include <crepe/api/GameObject.h>
-#include <iostream>
-#include <thread>
+#include <crepe/api/ParticleEmitter.h>
+#include <crepe/system/ParticleSystem.h>
 
 using namespace crepe::api;
 using namespace crepe;